PREP. Heat about 2 inches of oil in a heavy pot over medium high heat until it reaches 350 degrees. Place granulated sugar in a paper bag or a small bowl.
SHAPE. Flatten each biscuit dough, then cut them into fourths. Cut a small slit into the rounded part of the dough and press cut edges into heart shape with fingers or the tip of a knife.
FRY. Drop the dough into the oil by the bottom point of the heart to get an elongated heart shape. Carefully fry the heart-shaped dough until golden brown (about a minute on each side) then transfer to a paper towel to absorb any excess oil.
SAUCE. While your donuts cool, it's sauce time! Place a small saucepan over medium heat. Add in the strawberries and white wine. Simmer until the strawberries begin to break down, mashing with a fork or potato masher to help them. Cook until reduced and thickened, about 5 minutes. Take off the heat and add balsamic vinegar. Stir to combine, then swirl into sweetened condensed milk.
DRIZZLE. Dunk each heart donut into a bowl of sugar while they're still warm for a delightful outer crunch. Once cooled, drizzle the homemade strawberry sauce generously over the donuts. The combination of the fluffy donut and the sweet-tart strawberry sauce is pure bliss.
SERVE. Arrange these delectable heart-shaped treats on a pretty plate, and voilà! You've just created a masterpiece of love in the form of Easy Heart Donuts with Strawberry Sauce.